<template>
  <div class="app-container">
    <el-form label-width="120px">
      <el-form-item label="讲师名称">
        <el-input v-model="teacher.name" />
      </el-form-item>

      <!-- :min="0" 已修改处 -->
      <el-form-item label="讲师排序">
        <el-input-number
          v-model="teacher.sort"
          controls-position="right"
          :min="0"
        />
      </el-form-item>

      <el-form-item label="讲师头衔">
        <el-select v-model="teacher.level" clearable placeholder="请选择">
          <!-- 数据类型一定要和取出的json中的一致，否则没法回填 因此，这里value使用动态绑定的值，保证其数据类型是number-->
          <el-option :value="1" label="高级讲师" />
          <el-option :value="2" label="首席讲师" />
        </el-select>
      </el-form-item>

      <el-form-item label="讲师资历">
        <el-input v-model="teacher.career" />
      </el-form-item>

      <el-form-item label="讲师简介">
        <el-input v-model="teacher.intro" :rows="10" type="textarea" />
      </el-form-item>

      <!-- 讲师头像 -->
      <el-form-item label="讲师头像">
        <!-- 头衔缩略图 -->
        <pan-thumb :image="teacher.avatar" />

        <!-- 文件上传按钮 -->
        <el-button
          type="primary"
          icon="el-icon-upload"
          @click="imagecropperShow = true"
          >更换头像
        </el-button>
        <!--
              v-show：是否显示上传组件
              :key：类似于id，如果一个页面多个图片上传控件，可以做区分
              :url：后台上传的url地址
              @close：关闭上传组件
              @crop-upload-success：上传成功后的回调 -->
        <image-cropper
                        v-show="imagecropperShow"
                        :width="300"
                        :height="300"
                        :key="imagecropperKey"
                        :url="BASE_API + '/eduoss/fileoss/uploadOssFile'"
                        field="file"
                        @close="close"
                        @crop-upload-success="cropSuccess"/>
      </el-form-item>

      <el-form-item>
        <el-button
          :disabled="saveBtnDisabled"
          type="primary"
          @click="saveOrUpdate"
          >保存</el-button
        >
      </el-form-item>
    </el-form>
  </div>
</template>

<script>
import teacherApi from "@/api/edu/teacher"; // 引入请求teacher.js
// 引入组件
import ImageCropper from "@/components/ImageCropper";
import PanThumb from "@/components/PanThumb";

export default {
  // 组件声明
  components: {
    ImageCropper,
    PanThumb
  },

  //核心代码
  filters: {
    statusFilter(status) {
      const statusMap = {
        published: "success",
        draft: "gray",
        deleted: "danger"
      };
      return statusMap[status];
    }
  },
  data() {
    // 定义数据变量，初始值
    return {
      teacher: {
        name: "",
        sort: 0,
        level: 1,
        career: "",
        intro: "",
        avatar: ""
      },
      BASE_API: process.env.BASE_API, // 获取BASE_API的值
      imagecropperKey: 0, // 上传组件 key
      imagecropperShow: false, //上传弹窗是否显示
      saveBtnDisabled: false // 保存按钮是否禁用,
    };
  },
  created() {
    this.init();
  },
  watch: {
    // 监听
    $route(to, from) {
      // 路由方式反生变化，该方法执行
      this.init();
    }
  },
  methods: {
    // 关闭弹窗的方法
    close() {
      this.imagecropperKey = this.imagecropperKey + 1,
      this.imagecropperShow = false;
    },
    // 上传头像成功后执行的方法
    cropSuccess(data) {
      this.teacher.avatar = data.url;
      this.imagecropperKey = this.imagecropperKey + 1,
      this.imagecropperShow = false;
    },

    init() {
      if (this.$route.params && this.$route.params.id) {
        const id = this.$route.params.id;
        this.getTeacherInfo(id);
      } else {
        this.teacher = {};
      }
    },
    // 添加或修改讲师
    saveOrUpdate() {
      this.saveBtnDisabled = true;
      if (this.teacher.id) {
        this.getUpdateTeacher(this.teacher);
      } else {
        this.saveTeacher();
      }
      // 路由跳转
      this.$router.push({ path: "/teacher/table" });
    },
    // 保存讲师
    saveTeacher() {
      teacherApi.addTeacher(this.teacher).then(response => {
        this.$message({
          type: "success",
          message: "保存成功"
        });
      });
    },
    // 根据讲师id获得数据
    getTeacherInfo(id) {
      teacherApi.getTeacherInfo(id).then(response => {
        this.teacher = response.data.teacher;
      });
    },
    // 修改讲师信息
    getUpdateTeacher(teacher) {
      teacherApi.getUpdateTeacher(teacher).then(response => {
        this.$message({
          type: "success",
          message: "修改成功"
        });
      });
    }
  }
};
</script>
